Display device including subpixels having light-shielded opening portions

ABSTRACT

According to one embodiment, a display device includes a display panel including a plurality of pixels arranged in a non-rectangular display area, and a display controller configured to display images in the display area. An opening portion of each of pixels disposed at an edge portion of the display area is light-shielded at an area ratio according to a shape of the display area.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation Application of PCT Application No.PCT/JP2019/039689, filed Oct. 8, 2019 and based upon and claiming thebenefit of priority from Japanese Patent Application No. 2018-213048,filed Nov. 13, 2018, the entire contents of all of which areincorporated herein by reference.

FIELD

Embodiments described herein relate generally to a display device.

BACKGROUND

In a display device, various images are displayed on a display area ofthe display device (a display panel).

The shape of the display area of such a display device is generallyrectangular, but in recent years, display devices including displayareas of various shapes other than rectangular have been developed.

However, depending on the shape of the display area described above,rattling or the like may be noticeable at an edge of the display area.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view schematically showing a configuration of adisplay device according to the first embodiment.

FIG. 2 is a diagram showing an example of a circuit configuration of adisplay panel.

FIG. 3 is a diagram showing an example of a cross-sectional structure ofthe display panel.

FIG. 4 is a diagram illustrating an example of a pixel array.

FIG. 5 is a diagram specifically showing a non-rectangular display area.

FIG. 6 is a diagram illustrating a boundary portion between thenon-rectangular display area and a non-display area.

FIG. 7 is a diagram illustrating opening portions of respective pixelsdisposed at an edge portion of the display area.

FIG. 8 is a diagram specifically showing the opening portions of therespective pixels.

FIG. 9 is a diagram illustrating an example of a pixel array in thesecond embodiment.

FIG. 10 is a diagram showing a boundary portion between anon-rectangular display area and a non-display area.

FIG. 11 is a diagram illustrating opening portions of respectivesubpixels included in pixels disposed at an edge of the display area.

FIG. 12 is a diagram specifically showing the opening portions of therespective subpixels.

FIG. 13 is a diagram showing an edge portion of the display area whenthe size of openings is adjusted in units of pixels.

FIG. 14 is a diagram showing the edge portion of the display area whenthe size of the openings is adjusted in units of two subpixels.

FIG. 15 is a diagram showing another example of the pixel array.

FIG. 16 is a diagram showing still another example of the pixel array.

DETAILED DESCRIPTION

In general, according to one embodiment, a display device includes adisplay panel including a plurality of pixels arranged in anon-rectangular display area, and a display controller configured todisplay images in the display area. An opening portion of each of pixelsdisposed at an edge portion of the display area is light-shielded at anarea ratio according to a shape of the display area.

Various embodiments will be described hereinafter with reference to theaccompanying drawings.

The disclosure is a mere example, and arbitrary change of gist which canbe easily conceived by a person of ordinary skill in the art naturallyfalls within the inventive scope. To more clarify the explanations, thedrawings may pictorially show width, thickness, shape and the like, ofeach portion as compared with an actual aspect, but they are mereexamples and do not restrict the interpretation of the invention. Ineach drawing, reference numerals may be omitted for the same or similarelements arranged consecutively. In the present specification anddrawings, elements like or similar to those in the already describeddrawings may be denoted by similar reference numbers and their redundantdetailed descriptions may be arbitrarily omitted.

First Embodiment

FIG. 1 is a perspective view schematically showing a configuration of adisplay device according to the present embodiment. FIG. 1 shows athree-dimensional space defined by a first direction X, a seconddirection Y perpendicular to the first direction X, and a thirddirection Z perpendicular to the first direction X and the seconddirection Y. Note that the first direction X and the second direction Yare orthogonal to each other, but they may intersect at an angle otherthan 90°. Further, in the description of FIG. 1 , the third direction Zis defined as an upper side, and a direction opposite to the thirddirection Z is defined as a lower side. With such expressions “a secondmember above a first member” and “a second member below a first member”,they are meant that the second member may be in contact with the firstmember or may be separated from the first member.

Hereinafter, the embodiments will be described in connection with anexample case where the display device is a liquid crystal display devicewhich employs a liquid crystal layer, but the display device may be anorganic electroluminescence (EL) display device using an organiclight-emitting layer or an LED display device employing a light-emittingdiode (LED).

The display device 10 shown in FIG. 1 includes a display panel 11. Forexample, the display panel 11 has a rectangular shape. In the exampleillustrated, short sides of the display panel 11 are parallel to thefirst direction X, and long sides of the display panel 11 are parallelto the second direction Y. The third direction Z corresponds to athickness direction of the display panel 11. A main surface of thedisplay panel 11 is parallel to an X-Y plane defined by the firstdirection X and the second direction Y.

The display panel 11 includes a first substrate (an array substrate)111, a second substrate (counter-substrate) 112 disposed to oppose thefirst substrate 111 and a liquid crystal layer (not shown) formedbetween the first substrate 111 and the second substrate 112. Note thata panel driver (a display controller) 113 that drives the display panel11 is mounted on, for example, the first substrate 111.

Further, although not shown in FIG. 1 , the display panel 11 includes adisplay area, which is an area for displaying images. In the displayarea, a plurality of pixels PX are arranged (arrayed).

Furthermore, for example, a host device HOS is provided on an outer sideof the display panel 11, and the host device HOS is connected to thedisplay panel 11 via a flexible printed circuit board FPC1 and a paneldriver 113.

The panel driver 113 inputs image signals output from the host deviceHOS, and thus displays images on the display panel 11 by driving thepixels PX based on the image signals.

On a lower side of the first substrate 111 (that is, a rear surface sideof the display panel 11), a backlight unit 12 (an illumination device)that irradiates white light onto the display panel 11 is arranged. Aflexible printed circuit board FPC2 connects the backlight unit 12 andthe host device HOS to each other. As the backlight unit 12, varioustypes can be utilized, and as the light source, there are a light sourcewhich employs a light-emitting diode (LED), a light source which employsa cold-cathode fluorescent tube (CCFL), and the like.

Here, the case of employing the backlight unit 12 arranged on the rearsurface side of the display panel 11 has been described, but a frontlight arranged on a display surface side of the display panel 11 may beused. Further, in place of the backlight unit 12, an illuminating devicewhich employs a light guide and an LED or a cold-cathode fluorescenttube arranged on the side thereof may be used, or an illuminating devicewhich employs a dotted light source in which light emitting elements arearranged in a plane may be used. Note that when the display device 10 isan organic EL display device or an LED display device, the displaydevice 10 may be of a structure without an illumination unitcorresponding to the backlight unit 12.

Further, the display panel 11 in the present embodiment may be any of atransmissive type, a reflective type and a transflective type. Thedisplay device 10 to which the transmissive display panel 11 is appliedincludes the backlight unit 12 on the rear surface side of the firstsubstrate 111 as described above, and has a transmissive displayfunction which displays images by selectively transmitting the lightfrom the backlight unit 12. The display device 10 to which thereflective display panel 11 is applied has a reflective layer thatreflects light on the rear surface side of the display panel 11 withrespect to the liquid crystal layer, and has a reflective displayfunction which displays images by selectively reflecting the light froma front surface side (a display surface side) of the second substrate112. Note that an auxiliary light source may be provided on the frontsurface side of the reflective display panel 11. Further, the reflectivelayer may be formed of a material having a reflective function such asmetal so as to form an electrode on the rear surface side of the displaypanel 11 with respect to the liquid crystal layer. The display device 10to which the transflective display panel 11 is applied has thetransmissive display function and reflective display function describedabove.

FIG. 2 shows an example of a circuit configuration of the display panel11 shown in FIG. 1 . As shown in FIG. 2 , the display panel 11 includesa scanning line driver 21, a data signal line driver 22, and a powerline driver 23.

Here, as described above, a plurality of pixels PX are arranged in thedisplay panel 11 (the display area DA). In FIG. 2 , for the sake ofconvenience, only one of the pixels PX is shown. Similarly, in FIG. 2 ,for the sake of convenience, only a part of the display area DA in whichone pixel PX is disposed is shown. Note that the details of thearrangement (the pixel array) of the pixels PX and the display area DAin this embodiment will be described later.

In this embodiment, each pixel PX includes, for example, four subpixelsSR, SG, SB and SW. The subpixel SR is a subpixel that outputs lightcorresponding to a red wavelength band (that is, red component light).The subpixel SG is a subpixel that outputs light corresponding to agreen wavelength band (that is, green component light). The subpixel SBis a subpixel that outputs light corresponding to a blue wavelength band(that is, blue component light). The subpixel SW is a subpixel thatoutputs light corresponding to a white wavelength band (white componentlight). In the pixel PX, the subpixels SR, SG, SB and SW are arrangedalong, for example, a row direction (the second direction Y).

In the display panel 11, a plurality of scanning lines WSL extendingalong the row direction of the plurality of pixels PX, a plurality ofpower supply lines DSL extending in parallel with the plurality ofscanning lines WSL, and a plurality of data signal lines SGL extendingalong a column direction (the first direction X) of the plurality ofpixels PX are further disposed. One end of each scanning line WSL isconnected to the scanning line driver 21. One end of each data signalline SGL is connected to the data signal line driver 22. One end of eachpower supply line DSL is connected to the power supply line driver 23.

The above-described subpixels SR, SG, SB and SW are respectivelydisplaced at intersections of the respective scanning lines WSL and therespective data signal lines SGL.

Here, the configuration of the subpixel SR will be described. As shownin FIG. 2 , the subpixel SR includes a pixel switch SW. The pixel switchSW includes a thin film transistor (TFT). A gate electrode of the pixelswitch SW is electrically connected to the corresponding scanning lineSWL. One of a source electrode and a drain electrode of the pixel switchSW is electrically connected to the corresponding signal line SGL. Theother of the source electrode and the drain electrode of the pixelswitch SW is connected to the corresponding pixel electrode PE.

Note that the scanning line driver 21 applies an on-voltage to thescanning line WSL and supplies the on-voltage to the gate electrode ofthe pixel switch SW electrically connected to the scanning line WSL.Thus, conduction is established between the source electrode and thedrain electrode of the pixel switch SW in which the on-voltage issupplied to the gate electrode.

The data signal line driver 22 supplies an output signal (image signal)corresponding to each of the signal lines SGL. The signal supplied tothe signal line SGL is applied to the corresponding pixel electrode PEvia the pixel switch SW in which the source electrode and the drainelectrode are electrically connected.

The power supply line driver 23 supplies a drive signal (applies a drivevoltage) to the common electrode COME. The pixel electrode PE and thecommon electrode COME described above are arranged so as to oppose eachother via an insulating film. The pixel electrode PE, the commonelectrode COME and the insulating film form a storage capacitor CS.

Here, the configuration has been described in connection with thesubpixel SR, and the other subpixels SG, SB and SW have a configurationsimilar thereto.

Note that the scanning line driver 21, the data signal line driver 22and the power supply line driver 23 are disposed on an edge region (aframe) of the display panel 11, and are controlled by the panel driver113 described above. Although not shown, the panel driver 113 controlsthe operation of the backlight unit 12.

Although only one scanning line driver 21 is shown in FIG. 2 , thedisplay panel 11 may be configured to include a plurality of scanningline drivers 21. For example, when two scanning line drivers 21 areprovided, it can be configured such that a part of the plurality ofscanning lines WSL is connected to one scanning line driver 21 and therest is connected to the other scanning line driver 21. Note that thetwo scanning line drivers 21 are provided, the scanning line drivers 21are arranged so as to oppose each other while interposing the pluralityof pixels PX therebetween.

Although a relatively simple circuit configuration (pixel circuit) hasbeen described with reference to FIG. 2 , the display panel 11 in thisembodiment may have some other circuit configuration.

FIG. 3 shows an example of a sectional structure of the display panel11. In FIG. 3 , for the sake of convenience, only a cross section (thatis, a part of the cross section of the display panel 11) of thesubpixels SR, SG, SB, and SW included in one pixel PX along the seconddirection Y is shown.

The first substrate 111 includes a first insulating substrate 31 such asof a glass or resin substrate having light transmitting property. Thefirst substrate 111 also includes a switching element SW, a pixelelectrode PE, a common electrode COME, a first insulating layer 32, asecond insulating layer 33 and a first alignment film 34.

The switching element SW is disposed in each of the subpixels SR, SG, SBand SW. The switching element SW is provided on a surface of the firstinsulating substrate 31, which opposes the second substrate 112, and iscovered with the first insulating layer 32.

Note that, in FIG. 3 , the scanning line WSL, the power supply line DSL,the data signal line SGL and the like are omitted. Further, in FIG. 3 ,the switching element SW is illustrated in a simplified manner.Specifically, the first insulating layer 32 includes a plurality oflayers, and the switching element SW includes a semiconductor layer andvarious electrodes formed in the layers.

In the example shown in FIG. 3 , one pixel electrode PE is provided foreach of the subpixels SR, SG, SB and SW, and a common electrode COME isprovided over the subpixels SR, SG, SB and SW. The common electrode COMEis formed on the first insulating layer 32. As shown in FIG. 3 , thecommon electrode COME is formed so as to open at positions opposing therespective pixel electrodes PE. The common electrode COME is covered bythe second insulating layer 33.

The pixel electrode PE is formed on the second insulating layer 33 andopposes the common electrode COME. Each pixel electrode PE iselectrically connected to the switching elements SW of the subpixels SR,SG, SB and SW, respectively. The pixel electrode PE and the commonelectrode COME can be formed of a transparent conductive material suchas indium tin oxide (ITO).

The first alignment film 34 covers the pixel electrode PE and is incontact with the liquid crystal layer LC. The first alignment film 34 issubjected to an alignment process such as a rubbing process or a photoalignment process.

On the other hand, the second substrate 112 includes a second insulatingsubstrate 41 such as a glass or resin substrate having lighttransmitting property.

The second substrate 112 also includes filter layers 42R, 42G, 42B and42W at positions corresponding to the subpixels SR, SG, SB and SW,respectively. The filter layers 42R, 42G, 42B and 42W are provided on asurface of the second insulating substrate 41, which opposes the firstsubstrate 111.

Note that the subpixel SR is a subpixel that outputs light correspondingto the red wavelength band (that is, displays red), the filter layer 42Rincludes a red color filter. Similarly, the subpixel SG is a subpixelthat outputs light corresponding to the wavelength band of green (thatis, displays green), the filter layer 42G includes a green color filter.The subpixel SB is a subpixel that outputs light corresponding to theblue wavelength band (that is, displays blue), the filter layer 42Bincludes a blue color filter. The subpixel SW is a subpixel that outputslight corresponding to the white wavelength band (that is, displayswhite), the filter layer 42W may be, for example, a transparent filteror the like.

Further, the second substrate 112 includes a light-shielding layer (ablack matrix) 43, an overcoat layer 44 and a second alignment film 45.

The light-shielding layer 43 is arranged at a boundary between thesubpixels SR, SG, SB and SW in a plan view from a directionperpendicular to the first substrate 111 and the second substrate 112described above. More specifically, the light-shielding layer 43 isdisposed so as to overlap the scanning line WSL, the power supply lineDSL and the data signal line SGL described above, and to partition eachsubpixel SR, SG, SB and SW.

In the display device 10, various images are displayed by outputtinglight from portions (opening portions) of the pixels PX (subpixels SR,SG, SB and SW), which do not overlap the light-shielding layer 43. Notethat, for example, when a pixel PX is arranged in a region other thanthe display area DA(, which will be referred to as a non-display areahereinafter), the light-shielding layer 43 is arranged at a positionoverlapping the pixel PX and thus the display area DA can be formed.

The overcoat layer 44 covers the filter layers 42R, 42G, 42B and 42W andplanarizes surfaces of the filter layers 42R, 42G, 42B and 42W.

The second alignment film 45 covers the overcoat layer 44 and is incontact with the liquid crystal layer LC. As in the case of the firstalignment film 34, the second alignment film 45 is subjected to analignment process such as a rubbing process or a photo alignmentprocess.

Note that a first optical element OD1, which includes a first polarizerPL1 is disposed on a surface of the first insulating substrate 31,opposite to a side opposing the second substrate 112. Further, a secondoptical element OD2, which includes a second polarizer PL2 is disposedon a surface of the second insulating substrate 41, opposite to a sideopposing the first substrate 111. A first polarization axis (or a firstabsorption axis) of the first polarizer PL1 and a second polarizationaxis (or a second absorption axis) of the second polarizer PL2 are in across-Nicol relationship, which is orthogonal to each other.

Here, with reference to FIG. 4 , the pixel array in this embodiment willbe described. FIG. 4 simply shows an array of a plurality of pixels PXarranged on the display panel 11 in this embodiment.

In this embodiment, each of the pixels PX arranged on the display panel11 includes a plurality of subpixels SR, SG, SB and SW as describedabove. Blocks arranged in a matrix in FIG. 4 each represent a subpixelincluded in each pixel PX. Further, a block labeled “R” represents thesubpixel SR, a block labeled “G” represents the subpixel SG, a blocklabeled “B” represents the subpixel SB, and a block labeled “W”represents the subpixel SW. The same applies to the following drawings.

In the pixel array according to this embodiment, for example, aplurality of pixels PX including subpixels SR, SG, SB and SW arrangedalong the row direction are arranged side by side along the rowdirection, and rows constituted by such a plurality of pixels PX arearranged side by side along a column direction.

Further, as shown in FIG. 4 , in the pixel array in this embodiment, aplurality of pixels PX (subpixels SR, SG, SB and SW) are arranged sothat subpixels SR, SG, SB and SW respectively form a stripe shape alongthe column direction. In other words, the pixels PX which constitute therespective rows of the pixel array are arranged such that the subpixelsthat output light corresponding to the wavelength band of the same colorare adjacent to each other along the column direction.

According to the configuration in which each pixel PX includes thesubpixels SR, SG, SB and SW as described above, the area transmittinglight is increased and thus the brightness can be improved as comparedto, for example, the configuration in which each pixel PX includes thesubpixels SR, SG and SB. Therefore, it is possible to suppress the powerconsumption of the backlight unit 12, for example.

Here, the shape of the display area DA described above is generallyrectangular, but in this embodiment, it is assumed that the display areaDA is formed into a non-rectangular shape. More specifically, as shownin FIG. 5 , it is assumed that the display area DA is formed to have arounded shape (round shape) at corners or the like, of the display panel11, for example.

Note that it suffices if the display area DA in this embodiment isnon-rectangular. That is, the display area DA may be formed to have, forexample, a circular shape as a whole, in addition to the one having apartially round shape as shown in FIG. 5 . Or, it may be formed in ashape having a side extending in a direction other than the directionorthogonal to or parallel to the row direction or the column directionin the pixel array described above.

Here, in order to form a non-rectangular display area DA shown in FIG. 6in the pixel array shown in FIG. 4 described above, such a configurationwill be assumed that the light-shielding layer 43 is provided at aposition overlapping the non-display area NDA of the pixels PX(subpixels SR, SG, SB and SW) (that is, the portion corresponding to thenon-display area NDA is covered by the light-shielding layer 43). Notethat FIG. 6 is an enlarged view of a part of the boundary portionbetween the display area DA and the non-display area NDA in the area inwhich the plurality of pixels PX are arranged.

In the case of such a configuration, for example, in a pixel PX1 shownin FIG. 6 , the subpixel SR and subpixel SG of the subpixels SR, SG, SBand SW are partially covered by the light-shielding layer 43, whereasthe other portion of the subpixel SG and the subpixels SB and SW are notcovered by the light-shielding layer 43. When displaying white, forexample, in such a pixel PX1, it is not possible to display anappropriate color to be displayed in the pixel PX1, because at least thered component and the green component are insufficient in the pixel PX1.That is, in the configuration in which the light-shielding layer 43 issimply provided at a position overlapping with the non-display area NDAto form the display area DA, a phenomenon occurs in which an uneven hueis visually recognized at an edge of the display area DA (hereinafter,referred to as coloring).

On the other hand, in order to avoid the coloring described above, forexample, a configuration in which the light-shielding layer 43 isprovided in all regions of the pixel PX1 (subpixels SR, SG, SB and SW)can be considered. However, with such a configuration, rattling isvisually noticeable at an edge portion of the display area DA.

Therefore, in this embodiment, each of the openings of the pixels PXdisposed at an edge portion of the display area DA is formed into a sizecorresponding to the shape of the display area DA. Note that in thisembodiment, the openings of the pixel PX (subpixels SR, SG, SB and SW)is a portion (area) that does not overlap the light-shielding layer 43of the pixel PX and is also a part where the light output from the pixelPX can be visually recognized. Further, for example, the area of atleast one of the subpixels SR, SG, SB and SW (for example, the subpixelSW) included in the pixel PX may be different from that of the othersubpixels. In such a case, the expression “each of the openings of thepixel PX (subpixels SR, SG, SB and SW) is formed into a sizecorresponding to the shape of the display area DA” includes the meaningof that the opening is shielded at an area ratio corresponding to theshape of the display area DA.

Hereinafter, with reference to FIG. 7 , the openings of the pixels PX(subpixels SR, SG, SB and SW) disposed at an edge portion of the displayarea DA when that shown in FIG. 6 in this embodiment is realized, willbe described.

Here, FIG. 7 shows pixels PX1 to PX5, and reference symbols L0 to L4noted in the blocks representing the subpixels included in each of thepixels PX1 to PX5 each indicate an aperture ratio of the respective oneof the subpixels. Note that the aperture ratio of a subpixel is, forexample, a ratio of the size of the opening of the subpixel to themaximum size of the opening of the subpixel, and is used to representthe size of the opening.

More specifically, L0 indicates that the aperture ratio of the subpixelrepresented by the block in which the L0 is noted is 0%. In other words,L0 indicates that the light-shielding layer 43 is provided at a positionoverlapping the subpixel so that the light for displaying images is notoutput from all regions of the subpixel represented by the block inwhich L0 is noted.

L1 indicates that the aperture ratio of the subpixel represented by theblock in which the L1 is noted is 25%. In other words, L1 indicates thatthe light-shielding layer 43 is provided at a position overlapping 75%of the region of the subpixel so that the light for displaying images isoutput from 25% of the region of the subpixel represented by the blockin which L1 is noted.

L2 indicates that the aperture ratio of the subpixel represented by theblock in which the L2 is noted is 50%. In other words, L2 indicates thatthe light-shielding layer 43 is provided at a position overlapping 50%of the region of the subpixel so that the light for displaying images isoutput from 50% of the region of the subpixel represented by the blockin which L2 is noted.

L3 indicates that the aperture ratio of the subpixel represented by theblock in which the L2 is noted is 75%. In other words, L3 indicates thatthe light-shielding layer 43 is provided at a position overlapping 25%of the region of the subpixel so that the light for displaying images isoutput from 75% of the region of the subpixel represented by the blockin which L3 is noted.

L4 indicates that the aperture ratio of the subpixel represented by theblock in which the L4 is noted is 100%. In other words, only a minimumrequired light-shielding layer 43 (that is, the light-shielding layer 43which partitions the area into the subpixel from the other surroundingsubpixels) is provided at a position overlapping the subpixel so thatthe light for displaying images is output from all regions of thesubpixel represented by the block in which the L4 is noted.

Note that in the example shown in FIG. 7 , L3 is noted in each of theblocks respectively representing the subpixels SR, SG, SB and SWincluded in the pixel PX1. This shows that the pixel PX1 has an apertureratio of 75%.

Further, L2 is noted in each of the blocks respectively representing thesubpixels SR, SG, SB and SW included in the pixel PX2. This shows thatthe pixel PX2 has an aperture ratio of 50%.

Moreover, L1 is noted in each of the block respectively representing thesubpixels SR, SG, SB and SW included in the pixel PX3. This shows thatthe pixel PX3 has an aperture ratio of 25%.

Similarly, L1 is noted in each of the blocks respectively representingthe subpixels SR, SG, SB and SW included in the pixel PX4. This showsthat the pixel PX4 has an aperture ratio of 25%.

Further, L0 is noted in each of the blocks respectively representing thesubpixels SR, SG, SB and SW included in the pixel PX5. This shows thatthe pixel PX5 has an aperture ratio of 0%.

As described above, in this embodiment, the aperture ratio is set pereach pixel PX, and the subpixels SR, SG, SB and SW included in the samepixel PX are formed to have the same aperture ratio (opening size).

Further, the aperture ratios of the pixels PX adjacent to the right sideof the pixels PX1 to PX5 shown in FIG. 7 (that is, the pixels PXarranged at locations other than the edge portion of the display areaDA) are each 100% (L4). That is, in this embodiment, it is designed thatthe size of each opening of the pixels PX disposed at the edge portionof the display area DA is less than or equal to the size of each openingof the pixels PX arranged in the display area DA other than the edgeportions.

Here, in this embodiment, the light-shielding layer 43 is provided(mounted) at a position overlapping the pixels PX1 to PX5 so that theopening of each of the pixels PX1 to PX5 disposed at the edge portion ofthe display area DA has a size corresponding to the shape (outline) ofthe display area DA. Here, the size of the opening (that is, theaperture ratio) is determined, for example, as follows.

First, let us suppose that an area where a plurality of pixels PX arearranged as shown in FIG. 6 above is divided into a display area DA anda non-display area NDA. Then, the ratio occupied by the display area DAthat overlaps the region with respect to the region of each pixel PX(,which will be referred to as the display area ratio of the pixel PX,hereinafter) is specified.

If the display area ratio of a pixel PX thus specified is, for example,0% to 12.5%, the aperture ratio of the pixel PX is set to 0% (that is,L0).

When the display area ratio of the pixel PX is, for example, 12.5% to37.5%, the aperture ratio of the pixel PX is set to 25% (that is, L1).

When the display area ratio of the pixel PX is, for example, 37.5% to62.5%, the aperture ratio of the pixel PX is set to 50% (that is, L2).

When the display area ratio of the pixel PX is, for example, 62.5% to87.5%, the aperture ratio of the pixel PX is set to 75% (that is, L3).

When the display area ratio of the pixel PX is, for example, 87.5% to100%, the aperture ratio of the pixel PX is set to 100% (that is, L4).

Specifically, when the area where a plurality of pixels PX are arrangedis divided into the display area DA and the non-display area NDA shownin FIG. 6 , the display area ratio of the pixel PX1 is applicable to62.5% to 87.5%. Therefore, the aperture ratio of the pixel PX1 is set to75% (L3).

Further, the display area ratio of the pixel PX2 is applicable to 37.5%to 62.5%, the aperture ratio of the pixel PX2 is set to 50% (L2).Similarly, the display area ratio of the pixels PX3 and PX4 isapplicable to 12.5% to 37.5%, the aperture ratio of the pixels PX3 andPX4 is set to 25% (L1). Further, the display area ratio of the pixel PX5is applicable to 0% to 12.5%, the aperture ratio of the pixel PX5 is setto 0% (L0).

As described above, in this embodiment, the size (aperture ratio) ofeach opening of the pixels PX disposed at the edge portion of thedisplay area DA is determined according to the shape (outline) of thedisplay area DA. Thus, the light-shielding layer 43 can be mounted (thatis, the opening is formed) at a position overlapping the pixel PX sothat the opening has the determined size.

The correspondence between the display area ratio and the aperture ratioin each case described above is an example. For example, when thedisplay area ratio is 0% to 33.3%, the aperture ratio may be set to 0%,when the display area ratio is 33.3% to 66.7%, the opening ratio may beset to 50%, and when the display area ratio is 66.7% to 100%, theopening ratio may be set to 100%. That is, the correspondence betweenthe display area ratio and the aperture ratio may be changedappropriately. In addition, the correspondence between the display arearatio and the aperture ratio may be determined according to, forexample, the performance of the display device 10 (for example, thenumber of pixels, the pixel arrangement or the like).

Further, this embodiment is described as provided above in connectionwith the case where the aperture ratio of the pixel PX is determinedbased on the display area ratio of each pixel PX. But, for example, theaperture ratio of the PX pixel may be set based on the non-display arearatio of the pixel PX (that is, the ratio occupied by the non-displayarea NDA that overlaps the region with respect to the region of thepixel PX).

Further, the aperture ratio of each pixel PX may be determined from aviewpoint other than the display area ratio and non-display area ratiodescribed above.

Here, FIG. 8 specifically shows the opening portions of the respectivepixels PX1 to PX5 formed according to the aperture ratios of therespective pixels PX1 to PX5 illustrated in FIG. 7 . Note that, in FIG.8 , the shaded portions indicate the portions where the light-shieldinglayer 43 is provided, and the portions where the light-shielding layer43 is not provided are equivalent to the opening portions of the pixelsPX1 to PX5 (subpixels SR, SG, SB and SW). Note that, as described above,the light-shielding layer 43 is provided at the positions whichpartition the area into the subpixels SR, SG, SB and SW, but thelight-shielding layer 43 used for partitioning of the subpixels SR, SG,SB and SW is omitted in FIG. 8 .

As shown in FIG. 8 , the light-shielding layer 43 is provided at thepositions overlapping the subpixels SR, SG, SB and SW included in thepixel PX1, respectively, so that the aperture ratios of the subpixelsSR, SG, SB and SW each are 75%. In the example shown in FIG. 8 , thelight-shielding layer 43 is provided at positions overlapping an upper12.5% region and a lower 12.5% region of each of the subpixels SR, SG,SB and SW included in the pixel PX1, and thus the aperture ratio (75%)of the pixel PX1 is realized.

In addition, the light-shielding layer 43 is provided at positionsrespectively overlapping the subpixels SR, SG, SB and SW included in thepixel PX2 so that the aperture ratios of the subpixels SR, SG, SB and SWeach are 50%. In the example shown in FIG. 8 , the light-shielding layer43 is provided at positions overlapping an upper 25% region and a lower25% region of each of the subpixels SR, SG, SB and SW included in thepixel PX2, and thus the aperture ratio of the pixel PX2 (50%) isrealized.

Further, the light-shielding layer 43 is provided at positionsrespectively overlapping the subpixels SR, SG, SB and SW included in thepixel PX3 so that the aperture ratios of the subpixels SR, SG, SB and SWeach are 25%. In the example shown in FIG. 8 , the light-shielding layer43 is provided at positions overlapping an upper 37.5% region and alower 37.5% region of each of the subpixels SR, SG, SB and SW includedin the pixel PX3, and thus the aperture ratio of the pixel PX3 (25%) isrealized. This also the case for the pixel PX4.

Further, the light-shielding layer 43 is provided at positionsrespectively overlapping the subpixels SR, SG, SB and SW included in thepixel PX5 so that the aperture ratios of the subpixels SR, SG, SB and SWeach are 0%. Note that the aperture ratio of the pixel PX5 (0%) isrealized by providing the light-shielding layer 43 at positionsrespectively overlapping all the regions of the subpixels SR, SG, SB andSW included in the pixel PX5.

The example shown in FIG. 8 is described on the assumption that thelight-shielding layer 43 is provided at positions overlapping the upperand lower regions of the subpixels SR, SG, SB and SW, but thelight-shielding layer 43 may be provided at positions overlapping theleft and right regions of the subpixels SR, SG, SB and SW. Further, thelight-shielding layer 43 may be provided along the boundary portionbetween each subpixel and a peripheral subpixel adjacent to the subpixel(that is, so as to surround the opening). That is, in this embodiment,if the aperture ratio of the pixel PX (subpixels SR, SG, SB and SW)described above can be realized, the light-shielding layer 43 may beprovided at positions different from those of the example shown in FIG.8 with a shape different from that thereof.

As described above, in this embodiment, each opening of the pixels PXdisposed at the edge portion of the non-rectangular display area DA isformed to have a size corresponding to the shape of the display area DA(that is, shielded by the area ratio). In this embodiment, with such aconfiguration, rattling at the edge portion of the non-rectangulardisplay area DA can be suppressed as compared to, for example, aconfiguration in which the sizes of the opening portions of all thepixels PX are the same.

Further, this embodiment is configured such that the size of eachopening of the pixels PX disposed at the edge portion of the displayarea DA is less than or equal to the size of each opening of the pixelsarranged in the display area DA other than the edge portion. With such aconfiguration, the brightness can be ensured in the area other than theedge portions of the display area DA, and the boundary portion betweenthe display area DA and the non-display area NDA can be smoothlyexpressed.

Note that in this embodiment, the light-shielding layer 43 is providedat positions overlapping the pixel PX, and thus the opening portions ofthe pixels PX disposed at the edge portions of the display area DA canbe formed to have a size corresponding to the shape of the display areaDA.

Further, for example, when the light-shielding layer 43 is provided asshown in FIG. 6 according to the shape of the display area DA, coloringoccurs at the edge portion of the display area DA; however in thisembodiment, the opening portions of a plurality of subpixels (forexample, subpixels SR, SG, SB and SW) included in the same pixel PX areformed to have the same size. That is, in this embodiment, the size ofthe openings is determined for each pixel as described above, and withsuch a configuration, the balance of the area ratio of the openingportions of the subpixels included in the pixel PX can be maintained(that is, shortage of some color components in the pixel PX can beavoided), thus making it possible to avoid the occurrence of thecoloring described above.

This embodiment is described in connection with the case where theopening portions of the subpixels SR, SG, SB and SW included in the samepixel PX are formed to have the same size (that is, the size of theopening is adjusted for each pixel). Here, note that the coloringdescribed above may occur when at least one of the color componentsdisplayed by the subpixels SR, SG and SB is insufficient, for example.Therefore, when the pixel PX includes the subpixels SR, SG, SB and SW,for example, such a configuration will do that the opening portions ofthe subpixels SR, SG and SB other than the subpixel SW may have the samesize.

Further, this embodiment is described in connection with the case whereeach of the plurality of pixels PX includes subpixels SR, SG, SB and SW,but such a configuration will do that each of the plurality of pixels PXincludes the subpixels SR, SG and SB. Even in the case of such aconfiguration, it is possible to avoid the occurrence of the coloring byadjusting the size of the opening for each pixel (that is, forming theopening portions of the subpixels SR, SG and SB to have the same size).

Further, the present embodiment may be applied to a configurationincluding a subpixel that outputs light corresponding to, for example, ayellow wavelength band in place of the subpixel SW included in each ofthe plurality of pixels PX.

Furthermore, this embodiment is described in connection with the casewhere the display panel 11 has the pixel array shown in FIG. 4 , but theorientation of the row or column of the pixel array may be different, orthe row and the column of the pixel array may be interchanged.

Moreover, this embodiment is described on the assumption that thedisplay panel 11 has a rectangular shape, but the display panel 11 mayhave a shape corresponding to the shape (non-rectangular shape) of thedisplay area DA, for example.

Further, this embodiment is described in connection with the case wherethe pixels PX are disposed also in the non-display area NDA, forexample, and the light-shielding layer 43 is provided at positionsoverlapping with the pixels PX. However, such a configuration will dothat the pixels PX is arranged only in the display area DA, and theopenings of the pixels PX disposed at the edge portion of the displayarea DA are formed as described in this embodiment.

Second Embodiment

Next, the second embodiment will be described. Note that theconfiguration and the like of the display device according to thisembodiment are similar to those of the first embodiment described above,and thus will be described with reference to FIGS. 1 to 3 and the likeas appropriate.

Here, the first embodiment provided above is described in connectionwith an example case where the display panel 11 includes the pixel arrayshown in FIG. 4 , but in this embodiment, the pixel array included inthe display panel 11 is different from that of the first embodimentdescribed above.

First, with reference to FIG. 9 , the pixel array in this embodimentwill be described. FIG. 9 simply shows an array of a plurality of pixelsPX arranged on the display panel 11 in this embodiment.

Note that in this embodiment, each of the pixels PX arranged in thedisplay panel 11 includes a plurality of subpixels SR, SG, SB and SW asin the case of the above-described first embodiment. Further, blocksarranged in a matrix in FIG. 9 each represent a subpixel included in arespective pixel PX. Note that a block labeled “R” represents a subpixelSR, a block labeled “G” represents a subpixel SG, a block labeled “B”represents a subpixel SB, and a block labeled “W” represents a subpixelSW, and these points are as shown in FIG. 4 described above.

Here, as shown in FIG. 9 , odd-numbered rows (for example, the firstrow) of the pixel array in this embodiment are each constituted by aplurality of pixels PX arranged along a row direction and including aplurality of subpixels arranged along the row direction. Similarly,even-numbered rows (for example, the second row) of the pixel array inthis embodiment are each constituted by a plurality of pixels PXarranged along the row direction and including a plurality of subpixelsarranged along the row direction. On the display panel 11, a pluralityof pixels PX which constitute such odd rows(, which will be referred toas odd-numbered row pixels PX, hereinafter) and a plurality of pixels PXwhich constitute even rows(, which will be referred to as even-numberedrow pixels PX, hereinafter) are arranged alternately along a columndirection.

Further, in this embodiment, the odd-numbered row pixels PX and theeven-numbered row pixels PX are arranged so that, for example, subpixelsthat output light corresponding to a wavelength band of the same color(that is, display the same color) are not to be adjacent to each otheralong the column direction.

According to such a pixel arrangement, there is an advantage that theresolution can be improved as compared to the case where, for example,the odd-numbered row pixels PX and the even-numbered row pixels PX arearranged such that the subpixels that output light corresponding to thewavelength band of the same color are adjacent to each other along thecolumn direction (that is, the pixel array shown in FIG. 4 describedabove).

Note that this embodiment will be description on the assumption that theodd-numbered row pixels PX of the pixel array include subpixels SR, SG,SB and SW along the row direction of the pixel array, and theeven-numbered row pixels PX of the pixel array include subpixels SB, SW,SR and SG along the row direction of the pixel array. That is, in thepixel array shown in FIG. 9 , the odd-numbered row pixels PX and theeven-numbered row pixels PX are arranged such that the subpixels SRincluded in the odd-numbered row pixels PX and the subpixels SB includedin the even-numbered row pixels PX are adjacent to each other along thecolumn direction.

Let us suppose here a configuration in which the light-shielding layer43 is provided at positions overlapping a non-display area NDA of aplurality of pixels PX (subpixels SR, SG, SB and SW) (that is, theportion corresponding to the non-display area NDA is covered by thelight-shielding layer 43) in order to form a non-rectangular displayarea DA shown in FIG. 10 in the pixel array shown in FIG. 9 describedabove. In the case of such a configuration, coloring may occur at anedge portion of the display area DA as described with reference to FIG.6 .

Therefore, in this embodiment, to be similar to the above-describedfirst embodiment, each opening portion of the pixels PX disposed at theedge portion of the display area DA (a portion of the pixels PX, whichdoes not overlap the light-shielding layer 43) is formed to have a sizecorresponding to the shape of the display area DA (that is, light isshielded by the area ratio).

The first embodiment provided above is described in connection the casewhere the size of the opening is adjusted per each pixel (that is, theopening portions of the subpixels SR, SG, SB and SW included in the samepixel PX have the same size). However, this embodiment will be describedon the assumption that, of the subpixels SR, SG, SB and SW included inthe pixels PX disposed at an edge portion of the display area DA, theopening portions of some of the subpixels (that is, first subpixels) andthe opening portions of the other subpixels (second subpixels) arerespectively formed into sizes corresponding to the shape of the displayarea DA. More specifically, in this embodiment, the size of the openingis adjusted in units of two subpixels of the subpixels SR, SG, SB and SWincluded in the pixels PX.

Hereinafter, with reference to FIG. 11 , the openings of subpixels SR,SG, SB and SW included in the pixels PX disposed at the edge portion ofthe display area DA, when the display area DA shown in FIG. 10 describedabove in this embodiment is realized, will be described.

It should be noted that L0 to L4 noted in the blocks each representingeach respective subpixel in FIG. 11 are similar to L0 to L4 noted in theblocks representing the respective subpixels in FIG. 7 described above,and each symbol represents the aperture ratio of the respectivesubpixel.

Let us suppose that the pixels PX1 to PX5 shown in FIG. 11 are disposedat an edge portion of the display area DA. Here, L1 is noted in theblocks respectively representing the subpixels SR and SG included in thepixel PX1, whereas L4 is noted in the blocks respectively representingthe subpixels SB and SW included in the pixel PX1. With thisconfiguration, it is indicated that the aperture ratio of each of thesubpixels SR and SG included in the pixel PX1 is 25%, and the apertureratio of each of the subpixels SB and SW included in the pixel PX1 is100%.

Further, L0 is noted in the blocks respectively representing thesubpixels SB and SW included in the pixel PX2, whereas L3 is noted inthe blocks respectively representing the subpixels SR and SG included inthe pixel PX. With this configuration, it is indicated that the apertureratio of each of the subpixels SB and SW included in the pixel PX2 is0%, and the aperture ratio of each of the subpixels SR and SG includedin the pixel PX2 is 75%.

Further, L0 is noted in the blocks respectively representing thesubpixels SR and SG included in the pixel PX3, whereas L2 is noted inthe blocks respectively representing the subpixels SB and SW included inthe pixel PX3. With this configuration, it is indicated that theaperture ratio of each of the subpixels SR and SG included in the pixelPX3 is 0%, and the aperture ratio of each of the subpixels SB and SWincluded in the pixel PX3 is 50%.

Similarly, L0 is noted in the block respectively representing thesubpixels SB and SW included in the pixel PX4, whereas L1 is noted inthe blocks respectively representing the subpixels SR and SG included inthe pixel PX4. With this configuration, it is indicated that theaperture ratio of each of SB and SW included in the pixel PX4 is 0%, andthe aperture ratio of each of the subpixels SR and SG included in thepixel PX4 is 25%.

Further, L0 is noted in the blocks respectively representing each of thesubpixels SR and SG included in the pixel PX5, whereas L0 is noted inthe blocks respectively representing the subpixels SB and SW included inthe pixel PX5. With this configuration, it is indicated that theaperture ratio of each of the subpixels SR and SG included in the pixelPX5 is 0% (L0), and the aperture ratio of each of the subpixels SB andSW included in the pixel PX5 is 0%.

As described above, in this embodiment, the aperture ratio is set inunits of two subpixels (subpixels SR and SG and subpixels SB and SW).That is, the subpixels SR and SG included in each pixel PX are formed soas to have the same aperture ratio (the same size of the opening), andthe subpixels SB and SW included in each pixel PX are formed to have thesame aperture ratio (the same size of the opening).

Note that the aperture ratios of the pixels PX adjacent to the rightside of the pixels PX1 to PX5 shown in FIG. 11 (that is, the pixels PXarranged in portions other than the edge portions of the display areaDA) each are 100% (L4).

Further, in this embodiment, the light-shielding layer 43 is provided(mounted) at positions respectively overlapping the pixels PX1 to PX5such that the opening portions of the pixels PX1 to PX5 disposed at theedge portions of the display area DA have sizes corresponding to theshape (outline) of the display area DA. Here, the sizes of the openings(that is, the aperture ratios) are determined as follows, for example.

First, when, as shown in FIG. 10 described above, an area in which theplurality of pixels PX are arranged is divided into the display area DAand the non-display area NDA, the ratio occupied by the display area DAthat overlaps the region with respect to the region of the subpixels SRand SG included in each pixel PX(, which will be referred to as thedisplay area ratio of the subpixels SR and SG, hereinafter) isspecified.

When the display area ratio of the subpixels SR and SG thus specifiedis, for example, 0% to 12.5%, the aperture ratio of the subpixels SR andSG is set to 0% (that is, L0).

When the display area ratio of the subpixels SR and SG is, for example,12.5% to 37.5%, the aperture ratio of the subpixels SR and SG is set to25% (that is, L1).

When the display area ratio of the subpixels SR and SG is, for example,37.5% to 62.5%, the aperture ratio of the subpixels SR and SG is set to50% (that is, L2).

When the display area ratio of the subpixels SR and SG is, for example,62.5% to 87.5%, the aperture ratio of the subpixels SR and SG is set to75% (that is, L3).

When the display area ratio of the subpixels SR and SG is, for example,87.5% to 100%, the aperture ratio of the subpixels SR and SG is set to100% (that is, L4).

Here, the aperture ratios of the subpixels SR and SG included in eachpixel PX are as described above, and the aperture ratios of thesubpixels SB and SW included in each pixel PX can be determinedsimilarly.

More specifically, when the area in which the plurality of pixels PX arearranged is divided into the display area DA and the non-display areaNDA as shown in FIG. 10 , the display area ratio of the subpixels SR andSG included in the pixel PX1 is applicable to 12.5% to 37.5%. Therefore,the aperture ratio of the subpixels SR and SG included in the pixel PX1is set to 25% (L1). On the other hand, the display area ratio of thesubpixels SB and SW included in the pixel PX1 is applicable to 100%, andtherefore the aperture ratio of the subpixels SB and SW is set to 100%(L4).

Further, the display area ratio of the subpixels SB and SW included inthe pixel PX2 is applicable to 0% to 12.5%, and therefore the apertureratio of the subpixels SB and SW is set to 0% (L0). On the other hand,the display area ratio of the subpixels SR and SG included in the pixelPX2 is applicable to 62.5% to 87.5%, and therefore the aperture ratio ofthe subpixels SR and SG is set to 75% (L3).

Furthermore, the display area ratio of the subpixels SR and SG includedin the pixel PX3 is applicable to 0% to 12.5%, and therefore theaperture ratio of the subpixels SR and SG is set to 0% (L0). On theother hand, the display area ratio of the subpixels SB and SW includedin the pixel PX3 is applicable to 37.5% to 62.5%, the aperture ratio ofthe subpixels SB and SW is set to 50% (L2).

Further, the display area ratio of the subpixels SB and SW included inthe pixel PX4 is applicable to 0% to 12.5%, and therefore the apertureratio of the subpixels SB and SW is set to 0% (L0). On the other hand,the display area ratio of the subpixels SR and SG included in the pixelPX4 is applicable to 12.5% to 37.5%, and therefore the aperture ratio ofthe subpixels SR and SG is set to 25% (L1).

Further, the display area ratio of the subpixels SR and SG included inthe pixel PX5 is applicable to 0% to 12.5%, and therefore the apertureratio of the subpixels SR and SG is set to 0% (L0). On the other hand,the display area ratio of the subpixels SB and SW included in the pixelPX5 is applicable to 0% to 12.5%, and therefore the aperture ratio ofthe subpixels SB and SW is set to 0%.

That is, in this embodiment, the size of the opening portions (theaperture ratio) of the subpixels SR and SG and the size of the openingportions (the aperture ratio) of the subpixels SB and SW, included ineach of the pixels PX disposed at the edge portions of the display areaDA are determined according to the shape (outline) of the display areaDA. In this manner, the light-shielding layer 43 can be mounted (thatis, the opening is formed) at positions overlapping the subpixels SR,SG, SB and SW included in the pixels PX so as to have the determinedsizes of the openings, respectively.

Note that, as in the case of the above-described first embodiment, thecorrespondence between the display area ratio and the aperture ratiodescribed above is an example, and the correspondence may beappropriately changed. In addition, the correspondence between thedisplay area ratio and the aperture ratio may be determined accordingto, for example, the performance of the display device 10 (for example,the number of pixels, the pixel arrangement or the like).

Further, this embodiment is described as above in connection with thecase where, for example, the aperture ratios of the subpixels SR and SGare determined based on the display area ratios of the subpixels SR andSG. But, the aperture ratio of the subpixels SR and SG may be determinedbased on the non-display area ratio (that is, the ratio occupied by thenon-display area NDA to the regions of the subpixels SR and SG). Notethat the same applies to the aperture ratios of the subpixels SB and SW.

Furthermore, the aperture ratios of the subpixels SR and SG and theaperture ratios of the subpixels SB and SW may be determined from aviewpoint other than the display area ratio and the non-display arearatio described above.

Here, FIG. 12 specifically shows the opening of each subpixel formedaccording to the aperture ratio of each subpixel described in FIG. 11 .Note that, in FIG. 12 , the shaded portions indicate the portions wherethe light-shielding layer 43 is provided, and the portions where thelight-shielding layer 43 is not provided are equivalent to the openingportions of the subpixels SR, SG, SB and SW. Although thelight-shielding layer 43 is provided at the position of partitioning thearea into the subpixels SR, SG, SB and SW, the light-shielding layer 43for the partitioning of the subpixels SR, SG, SB and SW is omitted inFIG. 12 .

As shown in FIG. 12 , the light-shielding layer 43 is provided atpositions respectively overlapping the subpixels SR and SG included inthe pixel PX1 such that the aperture ratios of the subpixels SR and SGeach are 25%. In the example shown in FIG. 12 , the light-shieldinglayer 43 is provided at positions respectively overlapping an upper37.5% region and a lower 37.5% region of the subpixels SR and SGincluded in the pixel PX1, and thus the aperture ratio (25%) of thesubpixels SR and SG is realized. On the other hand, the aperture ratiosof the subpixels SB and SW included in the pixel PX1 each are 100%, onlythe minimum necessary light-shielding layer 43 is provided at positionsrespectively overlapping the subpixels SB and SW.

Further, the light-shielding layer 43 is provided at positionsrespectively overlapping of the subpixels SB and SW included in thepixel PX2 such that the aperture ratios of the subpixels SB and SW eachare 0%. Note that the aperture ratio (0%) of the subpixels SB and SWincluded in the pixel PX2 is realized by providing the light-shieldinglayer 43 at positions overlapping all the regions of the subpixels SBand SW. On the other hand, the light-shielding layer 43 is provided atpositions respectively overlapping the subpixels SR and SG included inthe pixel PX2 such that the aperture ratios of the subpixels SR and SGeach are 75%. Note that, in the example illustrated in FIG. 12 , thelight-shielding layer 43 is provided at positions overlapping an upper12.5% region and a lower 12.5% region of the subpixels SR and SGincluded in the pixel PX2. Thus, the aperture ratio (75%) of thesubpixels SR and SG is realized.

Further, the light-shielding layer 43 is provided at positionsrespectively overlapping the subpixels SR and SG included in the pixelPX3 such that the aperture ratios of the subpixels SR and SG each are0%. On the other hand, the light-shielding layer 43 is provided atpositions respectively overlapping the subpixels SB and SW included inthe pixel PX3 such that the aperture ratios of the subpixels SB and SWeach are 50%. In the example shown in FIG. 12 , the light-shieldinglayer 43 is provided at positions overlapping an upper 25% region and alower 25% region of the subpixels SB and SW included in the pixel PX3.Thus, the aperture ratio (50%) of the subpixels SB and SW is realized.

The light-shielding layer 43 is provided at positions respectivelyoverlapping the subpixels SB and SW included in the pixel PX4 such thatthe aperture ratios of the subpixels SB and SW each are 0%. On the otherhand, the light-shielding layer 43 is provided at positions respectivelyoverlapping the subpixels SR and SG included in the pixel PX4 such thatthe aperture ratios of the subpixels SR and SG each are 25%. Note that,in the example illustrated in FIG. 12 , the light-shielding layer 43 isprovided at positions overlapping an upper 37.5% region and a lower37.5% region of the subpixels SR and SG included in the pixel PX4. Thus,the aperture ratio (25%) of the subpixels SR and SG is realized.

Further, the light-shielding layer is provided at positions respectivelyoverlapping the subpixels SR and SG included in the pixel PX5 such thatthe aperture ratios of the subpixels SR and SG each are 0%. Similarly,the light-shielding layer 43 is provided at positions respectivelyoverlapping the subpixels SR and SG included in the pixel PX5 such thatthe aperture ratios of the subpixels SB and SW each are 0%.

Note that the position where the light-shielding layer 43 is providedand the shape of the light-shielding layer 43 shown in FIG. 12 areexamples. That is, as in the case of the first embodiment describedabove, as long as the aperture ratios of the subpixels SR, SG, SB and SWcan be realized, the light-shielding layer 43 may be provided inpositions different from those of the example shown in FIG. 12 indifferent shapes.

As described above, in this embodiment, of the subpixels SR, SG, SB andSW (a plurality of subpixels) included in the pixels PX disposed at anedge portion of the non-rectangular display area DA, the openingportions of two subpixels SR and SG (first subpixels) and the openingportions of the other two subpixels SB and SW (second subpixels) areeach formed to have a size corresponding to the shape of the displayarea DA (shielded by the area ratio).

In this embodiment, with such a configuration, rattling at the edgeportions of the non-rectangular display area DA can be suppressed ascompared to, for example, a configuration in which the sizes of theopening portions of all the pixels PX are the same.

Here, FIG. 13 shows an edge portion of the display area DA in a widerrange than that of FIG. 8 when the size of the opening is adjusted pereach pixel as described in the first embodiment provided above. On theother hand, FIG. 14 shows an edge portion of the display area DA in awider range than that of FIG. 12 when the size of the opening isadjusted in units of two subpixels described in this embodiment.

As shown in FIGS. 13 and 14 , in this embodiment, the size of theopening is adjusted in units smaller than the pixel PX (in units of twosubpixel), and therefore, as compared to the first embodiment, theboundary portion (non-rectangular portion) between the display area DAand the non-display area NDA can be expressed more smoothly.

Note that in the first embodiment described above, the size of theopening is adjusted per each pixel PX (that is, the opening portions ofthe subpixels SR, SG, SB and SW are formed to have the same size). Thus,the balance of the area ratios of the opening portions of the subpixelsincluded in the pixel PX can be maintained, and the occurrence ofcoloring in the display area DA can be avoided.

On the other hand, in this embodiment, the size of the opening isadjusted in units of two subpixels, and therefore, unlike the firstembodiment described above, the area ratio of the openings of thesubpixels included in the pixel PX is off-balanced (that is, the sizesof the opening portions of the subpixels SR and SG and the openingportions of the subpixels SB and SW are different with respect to eachother), coloring may occur undesirably at the edge portions of thedisplay area DA.

However, in this embodiment, as described with reference to FIG. 9described above, a plurality of pixels PX (first pixels) whichconstitute an odd-numbered row (a first row) of the pixel array and aplurality of pixels PX (second pixels) which constitute an even-numberedrow (a second row) of the pixel array are arranged such that subpixelsthat display the same color (subpixels that output light correspondingto the same wavelength band) do not adjoin to each other along thecolumn direction of the pixel array.

According to such a pixel array, even when the opening portions of thesubpixels SR and SG are smaller than the opening portions of thesubpixels SB and SW as in the pixel PX1 shown in FIG. 12 , for example,it is still possible to complement the color to be expressed in thesubpixels SR and SG by the peripheral pixels PX (subpixels SR and SG).Therefore, the occurrence of coloring at an edge portion of the displayarea DA described above can be suppressed (that is, the degree that abiased hue is visually recognized can be reduced).

This embodiment may be applied to a configuration in which a pluralityof pixels PX including subpixels SR, SG and SB are arranged on thedisplay panel 11. More specifically, in the case shown in, for example,FIG. 15 , a plurality of pixels PX which constitute odd-numbered rowsand a plurality of pixels PX which constitute even-numbered rows arearranged such that subpixels displaying the same color are arranged soas not to be adjacent to each other along the column direction of thepixel array. In this case, the sizes of the openings can be adjusted inunits of two adjacent subpixels of the subpixels SR, SG and SB includedin each of the plurality of pixels PX. Thus, for example, the openingportions of the subpixels SR and SG included in a pixel PX, and theopening portions of the subpixel SB included in the pixel PX and thesubpixel SR included in a pixel PX adjacent to the pixel PX along therow direction (that is, the subpixel SR adjacent to the subpixel SB,respectively) each can be formed to have a size corresponding to theshape of the display area DA. With such a configuration, even in thecase where the plurality of pixels PX include the subpixels SR, SG andSB, the boundary portion between the display area DA and the non-displayarea NDA can be smoothly expressed as described above. Further, it ispossible to suppress the occurrence of coloring at the edge portions ofthe display area DA.

Further, this embodiment is described in connection with the case wherethe size of the opening is adjusted in units of two subpixels. But, evenin the case of the pixel array shown in FIG. 9 , as described in thefirst embodiment provided above, for example, the opening portions ofthe subpixels SR, SG and SB other than the subpixel SW may be formed tohave the same size. In other words, the sizes of the openings may beadjusted in units of subpixels SR, SG and SB and per each subpixel SW,which are included in the pixels PX.

Further, this embodiment is described in connection the case where eachof the plurality of pixels PX includes a plurality of subpixels arrangedalong the row direction, but each of the plurality of pixels PX may beconfigured to include the subpixels SR, SG, SB and SW arranged as shownin FIG. 16 . Even when the subpixels included in the plurality of pixelsPX are arranged as shown in FIG. 16 , the sizes of the openings can beadjusted in units of two subpixels (subpixels SR and SG and subpixels SBand SW) as described above. Note that, when the subpixels included inthe plurality of pixels PX are arranged as shown in FIG. 16 , the sizesof the openings can as well be adjusted per each pixel as described inthe first embodiment.

Further, this embodiment is described in connection with the case whereeach of the plurality of pixels PX includes the subpixels SR, SG, SB andSW, but the present embodiment may be applied to a configurationincluding a subpixel that outputs light corresponding to, for example, ayellow wavelength band in place of the subpixel SW.

Furthermore, this embodiment is described in connection with the casewhere the display panel 11 includes the pixel array shown in FIG. 9 ,but the orientation of the row or the column of the pixel array may bedifferent, or the row and the column may be interchanged.

Further, the display panel 11 in this embodiment may have a shapecorresponding to the shape (non-rectangular shape) of the display areaDA, for example.

Further, in this embodiment, the plurality of pixels PX may be arrangedonly in the display area DA.

Hereinafter, the invention according to the present embodiments will beadditionally noted.

[C1]

A display device including:

a display panel including a plurality of pixels arranged in anon-rectangular display area; and

a display controller configured to display images in the display area,wherein

an opening portion of each of pixels disposed at an edge portion of thedisplay area is light-shielded at an area ratio according to a shape ofthe display area.

[C2]

The display device of item [C1], further including: a light-shieldinglayer provided at a position overlapping with the pixels so as tolight-shield the opening portion of each the pixels disposed at the edgeportion of the display area at the area ratio according to the shape ofthe display area.

[C3]

The display device of item [C1], wherein

the opening portion of each of the pixels disposed at the edge portionof the display area is light-shielded at an area ratio corresponding toa ratio occupied by the display area overlapping the area of the pixel,with respect to the area of the pixel.

[C4]

The display device of any one of items [C1] to [C3], wherein

each of the plurality of pixels includes a plurality of subpixels thatoutput light corresponding to wavelength bands of colors different fromeach other, and

the opening portion of each of the plurality of subpixels included inthe same pixel of the plurality of pixels are formed to belight-shielded at the same area ratio.

[C5]

The display device of item [C4], wherein the plurality of subpixelsinclude a subpixel that outputs light corresponding to a red wavelengthband, a subpixel that outputs light corresponding to a green wavelengthband, a subpixel that outputs light corresponding to a blue wavelengthband, and a subpixel that outputs light corresponding to a whitewavelength band.

[C6]

The display device of any one of items [C1] to [C3], wherein

each of the plurality of pixels includes a subpixel that outputs lightcorresponding to a red wavelength band, a subpixel that outputs lightcorresponding to a green wavelength band, a subpixel that outputs lightcorresponding to a blue wavelength band and a subpixel that outputslight corresponding to a white wavelength band, and

opening portions of the subpixel that outputs light corresponding to thered wavelength band, the subpixel that outputs light corresponding tothe green wavelength band and the subpixel that outputs lightcorresponding to the blue wavelength band, included in the same pixel ofthe plurality of pixels, are formed to be light-shielded at a same arearatio.

[C7]

The display device of any one of items [C1] to [C3], wherein

each of the plurality of pixels includes a plurality of subpixels thatoutput light corresponding to wavelength bands of colors different fromeach other,

the plurality of pixels include a plurality of first pixels whichconstitute a first row of the pixel array and a plurality of secondpixels which constitute a second row adjacent to the first row in apixel array along a column direction,

the plurality of first pixels and the plurality of second pixels arearranged alternately along the column direction of the pixel array so asto avoid subpixels that output light corresponding to a wavelength bandof the same color from adjoining to each other along the columndirection of the pixel array, and

opening portions of the first subpixels and opening portions of thesecond subpixels of the plurality of subpixels included in pixelsdisposed at the edge portion of the display area are light-shielded atrespective area ratios according to the shape of the display area.

[C8]

The display device of item [C7], wherein

the first subpixels include a subpixel that outputs light correspondingto the red wavelength band and a subpixel that outputs lightcorresponding to the green wavelength band, adjacent to each other, ofthe plurality of subpixels arranged along the row direction in pixelsdisposed at the edge portion of the display area, and

the second subpixels include a subpixel that outputs light correspondingto the blue wavelength band and a subpixel that outputs lightcorresponding to the white wavelength band, adjacent to each other, ofthe plurality of the subpixels arranged along the row direction in thepixels disposed at the edge portion of the display area.

While certain embodiments have been described, these embodiments havebeen presented by way of example only, and are not intended to limit thescope of the inventions. Indeed, the novel embodiments described hereinmay be embodied in a variety of other forms; furthermore, variousomissions, substitutions and changes in the form of the embodimentsdescribed herein may be made without departing from the spirit of theinventions. The accompanying claims and their equivalents are intendedto cover such forms or modifications as would fall within the scope andspirit of the inventions.

What is claimed is:
 1. A display device comprising: a display panelcomprising a plurality of pixels arranged in a non-rectangular displayarea; and a display controller configured to display images in thedisplay area, wherein the plurality of pixels include a plurality offirst pixels which constitute a first row of the pixel array and aplurality of second pixels which constitute a second row adjacent to thefirst row in a pixel array along a column direction, each of theplurality of first pixels includes first and second subpixels thatoutput light corresponding to wavelength bands of colors different fromeach other, each of the plurality of second pixels includes the firstand second subpixels, the plurality of first pixels and the plurality ofsecond pixels are arranged alternately along the column direction of thepixel array so that the first subpixels included in the plurality offirst pixels do not adjoin to the first subpixels included in theplurality of second pixels and the second subpixels included in theplurality of first pixels do not adjoin to the second subpixels includedin the plurality of second pixels, opening portions of the first andsecond subpixels included in the first and second pixels disposed at theedge portion of the display area are light-shielded at respective arearatios according to the shape of the display area, the size of thelight-shielded area of the first subpixel included in the first pixel isdifferent from the size of the light-shielded area of the secondsubpixel included in the first pixel, the size of the light-shieldedarea of the first subpixel included in the second pixel is differentfrom the size of the light-shielded area of the second subpixel includedin the second pixel, and the size of the light-shielded area of thefirst subpixel included in the first pixel is different from the size ofthe light-shielded area of the second subpixel which is included in thesecond pixel and adjoins to the first subpixel included in the firstpixel along the column direction of the pixel array.
 2. The displaydevice of claim 1, wherein the first subpixels include a subpixel thatoutputs light corresponding to the red wavelength band and a subpixelthat outputs light corresponding to the green wavelength band, adjacentto each other, of the plurality of subpixels arranged along the rowdirection in pixels disposed at the edge portion of the display area,and the second subpixels include a subpixel that outputs lightcorresponding to the blue wavelength band and a subpixel that outputslight corresponding to the white wavelength band, adjacent to eachother, of the plurality of the subpixels arranged along the rowdirection in the pixels disposed at the edge portion of the displayarea.
 3. The display device of claim 1, further comprising: alight-shielding layer provided at a position overlapping with the pixelsso as to light-shield the opening portion of each of the first andsecond subpixels included in the first and second pixels disposed at theedge portion of the display area at the area ratio according to theshape of the display area.
 4. The display device of claim 1, wherein theopening portion of each of the first and second subpixels included inthe first and second pixels disposed at the edge portion of the displayarea is light-shielded at an area ratio corresponding to a ratiooccupied by the display area overlapping the area of the pixel, withrespect to the area of the pixel.